This bug was fixed in the package linux-keystone - 3.13.0-18.29
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linux-keystone (3.13.0-18.29) trusty; urgency=low
[ Ike Panhc ]
* Release Tracking Bug
- LP: #1392687
* Rebase to Ubuntu-3.13.0-40.69
[ Ubuntu: 3.13.0-40.69 ]
* Release Tracking Bug
- re-used
This bug was fixed in the package linux-keystone - 3.13.0-18.29
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linux-keystone (3.13.0-18.29) trusty; urgency=low
[ Ike Panhc ]
* Release Tracking Bug
- LP: #1392687
* Rebase to Ubuntu-3.13.0-40.69
[ Ubuntu: 3.13.0-40.69 ]
* Release Tracking Bug
- re-used
** Changed in: linux-keystone (Ubuntu)
Importance: Undecided = Medium
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https://bugs.launchpad.net/bugs/1386326
Title:
Support ftrace in the linux-keystone kernel
To manage
ubuntu@ubuntu:~$ grep TRACER /boot/config-3.13.0-18-keystone
# CONFIG_ATH5K_TRACER is not set
CONFIG_CONTEXT_SWITCH_TRACER=y
# CONFIG_FUNCTION_GRAPH_TRACER is not set
CONFIG_FUNCTION_TRACER=y
CONFIG_GENERIC_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
#
** Branch linked: lp:ubuntu/trusty-proposed/linux-keystone
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https://bugs.launchpad.net/bugs/1386326
Title:
Support ftrace in the linux-keystone kernel
To manage notifications about
Ubuntu-3.13.0-17.27 kernel (cross toolchains) + CONFIG_FTRACE
Seq block write: 124215
Seq block read: 247361
1.97,1.97,ubuntu,1,1415174007,13G124215,90,69289,60,,,247361,84,8646,395,,,645ms,655ms,,6983us,6955us,,
Ubuntu-3.13.0-17.27 kernel (cross toolchains) +
1.97,1.97,ubuntu,1,1415180590,13G123092,89,68307,59,,,242909,84,8904,368,,,686ms,658ms,,7699us,6824us,,
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https://bugs.launchpad.net/bugs/1386326
Title:
Support
Ubuntu-3.13.0-17.27 kernel (cross toolchains) + CONFIG_FTRACE +
CONFIG_FTRACE_SYSCALLS + CONFIG_SCHED_TRACER + CONFIG_TRACER_SNAPSHOT
Seq block write: 127101
Seq block read: 249724
I will propose this patch for next SRU cycle
** Patch added: 0001-UBUNTU-Config-Enable-FTRACE.patch
https://bugs.launchpad.net/ubuntu/+source/linux-keystone/+bug/1386326/+attachment/4253628/+files/0001-UBUNTU-Config-Enable-FTRACE.patch
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You received this bug notification because you are a
I will propose this patch for next SRU cycle
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https://bugs.launchpad.net/bugs/1386326
Title:
Support ftrace in the linux-keystone kernel
To manage notifications about this bug go to:
Ubuntu-3.13.0-17.27 kernel (cross toolchains) + CONFIG_FTRACE +
CONFIG_FTRACE_SYSCALLS + CONFIG_SCHED_TRACER + CONFIG_TRACER_SNAPSHOT +
CONFIG_BLK_DEV_IO_TRACE + CONFIG_PROBE_EVENTS + CONFIG_FUNCTION_TRACER +
CONFIG_FUNCTION_PROFILER + CONFIG_STACK_TRACER + CONFIG_ATH10K_TRACING +
Ubuntu-3.13.0-17.27 stock kernel (armhf native compiler)
Seq block write: 120256
Seq block read: 248465
1.97,1.97,ubuntu,1,1415173504,13G120256,88,68041,60,,,248465,83,8613,374,,,592ms,679ms,,5825us,6860us,,
Ubuntu-3.13.0-17.27 kernel (cross toolchains)
Seq block write:
I've enabled all FTRACE function in once but the kernel hangs when
booting without any message output. Now I am trying to build and test
the kernel with config enabled one by one. These config are safe to
enable.
CONFIG_STACK_TRACER, CONFIG_FUNCTION_TRACER, CONFIG_FTRACE
** Changed in:
The root cause of kernel hang found. CONFIG_FUNCTION_GRAPH_TRACER shall
be disabled.
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Title:
Support ftrace in the linux-keystone kernel
To
With most of ftrace enabled, bonnie++ shows we have SSD I/O performance
regression.
Sequential read speed from 131K/Sec down to 102K/Sec
--
Kernel version, 3.13.0-17.27 with ftrace enable
ubuntu@ubuntu:~$ bonnie++ -f -n 0
Writing intelligently...done
Rewriting...done
Reading
** Tags added: patch
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https://bugs.launchpad.net/bugs/1386326
Title:
Support ftrace in the linux-keystone kernel
To manage notifications about this bug go to:
** Changed in: linux-keystone (Ubuntu)
Assignee: (unassigned) = Ike Panhc (ikepanhc)
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Title:
Support ftrace in the linux-keystone kernel
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